The bags look like a flat ice tray, there is a funnel at the top. Pour the water in the top. It will take two, one to hold the bag and one to pour unless you fill them from your faucet. For lack of better words, the bag is sectioned into cube sized sections. The instructions say to turn the bag upside down to seal the funnel but I fold it over and clip it. Then lay them in your freezer flat. Voila! Ice!